Boiler-furnace and smoke-consumer



(No Mode1.)

R. R. TURNER.

BOILER FURNAGE AND SMOKE CONSUMER.

No. 518,870. l Patentexd Apr. 24, 1894.

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UNITED STATES PATENT OEEICE.

ROBERT R. TURNER, OF COLUMBUS, OHIO.

BOILER-FURNACE AND SMOKE-CONSUMER.

l SIECIFIGATION forming part of Letters Patent No. 518,870, dated April 24, 1,894.

Application iled February 17, 1894:- Serial No. 500,581. (No model.)

,To all whom it may oon/cerro:

Be it known that I, ROBERT R. TURNER, a citizen of the United States, residing at Oolumbus, in the county of Franklin and State of Ohio, have invented new and useful Improvements in Boiler-Furnaces and Smoke- Consumers, of which the following is a speciication.

My invention relates to boiler-furnaces, and the purpose thereof is to provide for the introduction of air at suitable points in the furnace in such manner that it shall be quickly heated to such a temperature that it will promote combustion and the complete consumption of the gaseous products of the fuel It is a further purpose of my invention to provide a boiler-furnace in which air to support combustion shallbe supplied from above and below, immediately in front of the tirebridge, the rair-currents being driven into the fire-chamber over heated surfaces from which it derives a high temperature before mingling with the products of combustion.

The invention consists in the novel features of construction and new combinations of parts hereinafter fully'described and then definitely pointed out in the claims which form part of this specification.

To enable those skilled in the art to which mysaidinvention pertains to fullyunderstand and to make, construct and use the same,Iwill now proceed to describe said invention in de'- tail, reference being had, for this purpose, to the accompanying drawings, in which- Figure 1 is a central vertical section of a furnace constructed in accordance with my invention, the section being taken from front to rear. Fig. 2 is a front elevation, the airinlets in the interior being shown in dotted lines.

In the said drawings the reference-numeral 1 indicates a structure of brick, or masonry, in which is the boiler-chamber, containing one or more boilers 2, which are usually of the tubular type. The construction of these parts may be of any suitable or preferred form.

The reference-numeral 3 indicates the rechamber, which is inclosed within masonry 4, the top of which consists of an arch 5, the whole being arranged in front of the main structure 1. The fire-chamber 3 is provided with a suitable grate 6, beneath which is the ash-pit?.

Between the fire-chamber and the lower portion ofthe boiler chamber is the fire-bridge, or bridge-wall 8, behind which the oor 9 of the boiler-chamber, slopes gently upward to the pediment 10, which supports ythe boiler. The front face of the bridge-wall, which rises above the nre-grate, is so constructed kas to have an increasing projection toward the opposite, or front end of the fire-chamber, and I prefer to form this projecting portion by a series of angular courses 12, which project successively one beyond the other and overhang the rearward end of the fire-chamber. The projecting portion may, if desired, comprise all that portion of the fire bridge which lies above the grate, but I prefer to project the lower course 12 at a point about half-way between the grate and the top of therebridge. The rearward portion of the arch 5 lies directly7 over the fire-bridge and is constructed with a `downwardly projecting, or

hanging portion 13, which drops below the inner face of the main portion of the arch.

Between the top of the fire-bridge and the hanging portion 13 of the arch is a passage 14 for the products of combustion, through which they ow from the nre-chamber into the boiler-chamber.

In the fire-bridge I form one or more vertical air-conduits 15, which extend upward far enough to communicate with a series of substantially horizontal tuyeres 16, opening into the rechamber immediately beneath the lower projection 12 of the fire-bridge, said tuyeres being formed at suitably frequent intervals from one end of the fire-bridge to the other, ornearly so.

In the upperportion of the arch 5 is placed a series of pipes, or 'conduits 17, of any suitable kind, opening at their outer ends through the end wall of the fire-chamber. At their opposite extremities these pipes, or conduits, l

open into a series of vertical tuyeres 18, which discharge directly in front of the hanging portion 13 of the arch, the .air being caused to flow over the vertical face thereof before it can enter the passage 1li. In asimilar manner, the air discharged from the tuyeres 16 is driven over the series of projections 12 before it min gles with the heated gases and products IOC of combustion fiowing through the passage 14. In both cases, the entering air is not only eX posed to the `fierce heat of the fire-chamber but is also brought into intimate contact with the intensely heated surfaces over which it is compelled to iow, whereby its temperature is raised to a high degree, so that it will promote combustion and largely increase the available heat, besides effecting a complete consumption of the products of combustion within the boiler-chamber, thus securing an important economy in fuel-consumption, proportionately to the steam-pressure produced.

It is evident that I inay employ a natural draft, or a forced draft, to supply the tu yeres 16 and 18, though the drawings of this application show the former, only. The various means for creating a forced draft are so well known however, that I do not regard it as necessary that any specific means for such purpose be illustrated.

I prefer to arch, or curve, the top of the firebrldge 8, as shown in dotted lines in Fig. 2, in order to assimilate its form to that of the overhanging arch 13 and render the passage 14 of equal dimensions throughout, or from side to side. I may, also, form the air-sup ply openings entirely within the masonry, or

fire-brick structure, and avoid the use of pipes entirely. By this construction of furnace I obtain a complete consumption oi' tbe smoke, so that the furnace may properly be called smokeless.

1. In a boiler furnace,a bridge wall having the upper end of its front portion provided with a series of forwardly projecting angular courses successively extending one beyond another, and a series of tuyeres formedin the body of the bridge wall and discharging horizontally directly beneath the said angular courses, substantially as described.

2. In a boiler furnace, a bridge wall having the upper end of its front part provided with a series of projecting angular courses successively extending one beyond another, tuyeres formed in the body of the bridge wall and discharging horizontally directly beneath the said angular courses, and an arch forming the top wall of the hre-chamber and having the rear portion overhanging the bridge wall projected downwardly belowr the inner face of the remaining portion and formed tuyeres discharging beneath the projection of the former and in front of the dropped p0rtion of the latter, substantially as described.

4. In aboiler-furnace, the combination with a fire-bridge having a series of tuyeres discharging, beneath a projecting portion of the wall, overhaiiging the rear end of the tirechainber, of an arched top to the fire-chamber, having a series of tuyeres discharging downwardly in front of a downwardly projected portion which overhangs the firebridge, substantially as described.

5. In a boiler-furnace, a tire-bridge having a series of angular projecting courses which extend successively and overhang the rear end of the fire-chamber, a series of tuyeres discharging beneath the lower angular course, an arched top wall having that portion which overhangs the rebridge dropped below the remaining portion, and a series of tuyeres discharging downward in front of said dropped portion, substantially as described.'

6. In a boiler furnace an upwardly arched, or convex fire-bridge, having a series of successively projecting angular courses which overhang the rear end of the fire-chamber, a series of tuyeres discharging air beneath the lower angular course, an arched top wall having that concave portion which overhangs the curved fire-bridge dropped below the remaining portion and a series of tuyeres discharging in front of said dropped, concave part, substantially as described.

In testimony whereof I have hereunto set my hand and affixed my seal in presence of two subscribing witnesses.

ROBERT R. TURNER. [1.. s]

Witnesses:

W. G. BRossMAN, J. T. ROGERS.

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